There’s a small screenshot on there showing the rank screen with 84.9% shot down ratio giving the ‘Bounty Hunter’ rank. That might suggest that 1 and 2 have different ranks, although Japanese Manual screenshots probably don’t reflect the live game very well.

EDIT: Okay the reason that’s all I can find for the JP manual is because that is the JP manual. I figured I had a copy - lo and behold I did. It’s just a small poster sized foldout with the exact contents as the above link. So, nothing to get the from the originals manual.

I leafed through the PAL manuals for 1 and 2 as well, they don’t have anything useful in.

EDIT: Found this video where they end on 98.9% granting them the “Perfectionist” rank. I’ll chuck that into the list at 98% for now. 3 more to find.